Portfolio Companies

We’re proud to support groundbreaking startups pushing innovation and transforming industries. Explore the companies we’ve backed and see how they’re shaping the future with cutting-edge ideas.

F25 BATCH

Allus AI

Transforming manufacturing with our next-gen Vision Foundation Model

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Y Combinator

Claybird

The full-stack AI ad company

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Y Combinator

Cortex AI

Large-scale real-world robot & egocentric data for embodied AI

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Y Combinator

Crunched

Excel AI analyst for Power Users

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Y Combinator

DiligenceSquared

AI-powered market due diligence for investment decisions

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Y Combinator

Hypercubic

AI to maintain and modernize COBOL/mainframes

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Y Combinator

Hyperspell

Memory for AI Agents

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Y Combinator

Icarus

Stratospheric birds for defense

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Y Combinator

Multifactor

Zero-trust authentication, authorization, and auditing for AI agents

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Y Combinator

Piggy Robotics

Humanoid robots that do your chores for the price of an iPhone

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Y Combinator

SellRaze

The fastest way to sell online

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Y Combinator

Sorce

Tinder for jobs

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Y Combinator

Sunflower

Building the Sobriety Platform for the future of Superintelligence

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Y Combinator

Uplane

Replace marketing agencies with AI

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Y Combinator

Zavo

AI Point of Sale for Restaurants

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Y Combinator

S25 BATCH

BlankBio

Computational toolkit for RNA therapeutics

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Y Combinator

BootLoop

Firmware in minutes, not months - rigorously tested on real hardware

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Y Combinator

Closera

AI employees for commercial real estate

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Y Combinator

Floot

The easiest and most powerful way to build apps with AI

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Y Combinator

GetASAP

8-hour Produce Distribution for Retailers of Any Size

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Y Combinator

Imprezia

The World's First AI-Native Ad Network

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Y Combinator

Pally

Intelligent Unified Inbox + Personal CRM

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Y Combinator

Perseus Defense

Building America's Golden Dome for drones

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Y Combinator

RealRoots

AI social app for female transplants

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Y Combinator

Risely

AI agents that automate administrative work across college campuses

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Y Combinator

The Interface

The foundations for AI-native media

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Y Combinator

Verne Robotics

AI models that teach robots new skills in hours

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Y Combinator

X25 BATCH

Airweave

Open-Source Tool That Lets Agents Search Any App

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Y Combinator

Besimple AI

AI powered data annotation

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Y Combinator

Blaxel

AWS for AI Agents

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Y Combinator

Cactus

AI copilot for solopreneurs

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Y Combinator

Eloquent AI

The AI Operator for Financial Services

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Y Combinator

Lyra

AI-Native Zoom For Revenue Teams

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Y Combinator

Scalar Field

Reinventing the trading terminal — one intelligent agent at a time.

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Y Combinator

Sygaldry Technologies

quantum-accelerated AI servers

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Y Combinator

text.ai

AI in your group chats

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Y Combinator

W25 BATCH

Artificial Societies

We use AI to simulate large groups of people and how they interact

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Y Combinator

A1Base

Twilio for AI Agents

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Y Combinator

Conntour

AI to monitor thousands of security cameras.

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Y Combinator

Enhanced Radar

AI for air traffic control

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Y Combinator

Mentra

Building the open source smart glasses operating system.

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Y Combinator

Misprint

Misprint is a data-driven marketplace for graded collectibles

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Y Combinator

Inversion Semiconductor

Manufacturing the most powerful chips, 15x faster

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Y Combinator

PAX Markets

Crypto exchange on a chip: faster and smaller than a datacenter.

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Y Combinator

Exin Therapeutics

Precision genetic therapies targeting neural activity across disorders

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Y Combinator

Pave Robotics

Robots that repair roads

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Y Combinator

Rocketable

The AI maximalist software holding company

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Y Combinator

Proception

Making humanoids dexterous enough to thread a needle

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Y Combinator

Reditus Space

Reusable Satellites for zero-g manufacturing

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Y Combinator

F24 BATCH

Alex

The Cursor for Xcode

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Y Combinator

Asha Health

We help medical practices launch their own AI clinic

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Y Combinator

CTGT

Entirely New AI Stack: Efficient and Safe Alternative to LLM Ecosystem

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Y Combinator

Ember Copilot

The only medical scribe that reduces claim denials by 55%

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Y Combinator

HumanLayer

Human-in-the-Loop for AI Agents

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Y Combinator

Innate

Teachable general-purpose robots

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Y Combinator

Keye

The Smartest Private Equity Investor

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Y Combinator

Lune AI

Lune AI - Better LLMs for code and technical tasks

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Y Combinator

PearAI

VSCode For The New Age of AI

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Y Combinator

Revi

AI-enabled M&A deal origination

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Y Combinator

Roundabout Technologies

AI-powered traffic lights

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Y Combinator

S24 BATCH

Ångström AI

Gen AI molecular simulations that reproduce wetlab results

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Y Combinator

Ares Industries

Building low-cost cruise missiles

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Y Combinator

Asterisk

AI Hacker for Codebases

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Y Combinator

Bayesline

Highly customizable and blazingly fast analytics for asset managers

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Y Combinator

Capitol AI

Capitol is a custom perplexity for every website in the world

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Y Combinator

Central

Eliminating business bullshit: payroll, benefits, compliance, etc

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Y Combinator

Cerulion

Open source operating system for robots

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Y Combinator

Conductor Quantum

Quantum computers on silicon chips using AI

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Y Combinator

DeepSim, Inc.

An AI physics simulator for AI chip design

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Y Combinator

DigitalCarbon

Transform Images And Videos Into Immersive 3D With AI

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Y Combinator

Entangl

Find & resolve issues in data center engineering & operations using AI

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Y Combinator

Exa Laboratories

Energy efficient chips for AI

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Y Combinator

Hestus, Inc.

An AI-powered CAD software

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Y Combinator

Kontigo

USDC-Smart Neobank for Latinos

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Y Combinator

Kopra Bio

Genetically engineered viruses that teach your immune system to kill cancer

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Y Combinator

Ligo Biosciences

AI designed enzymes for the chemical industry

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Y Combinator

ProhostAI

AI Property Manager for Airbnb & Short-Term Rental Hosts

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Y Combinator

RunLocal

The On-Device AI Deployment Platform

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Y Combinator

TaxGPT

AI Co-Pilot for Accountants

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Y Combinator

Ultra

Robots to package billions of e-commerce orders in warehouses

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Y Combinator

Usul

Win Defense Contracts with AI

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Y Combinator

Weave Robotics

Personal robots for the home--that ship in 2025

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Y Combinator

ZeroPath

Automatically find and fix your software vulnerabilities

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Y Combinator

W24 BATCH

Basalt

Constellations as a Service

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Y Combinator

W23 BATCH

Cosine

Your AI Co-developer

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Y Combinator

S21 BATCH

Promakhos Therapeutics

A therapeutics platform for curing inflammatory disorders

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Y Combinator

Non YC

GC AI

The best AI for legal teams.

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Y Combinator

Neurable

The Mind. Unlocked. Work Smarter. Live Better.

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Y Combinator

Strands

Changing the Future of Financial Markets Infrastructure One Strand at a Time

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Y Combinator

Wand

Enterprise AI done right.

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Y Combinator

Midas, our proprietary AI algorithm, helps us determine investment decisions by analyzing vast amounts of data to pinpoint high-potential startups. Devised, built, and managed internally by Multimodal, Midas is a pivotal, invaluable tool which fuels our investment strategy and is a critical factor in determining our supporting thesis for each founder team we back.